Results 21 - 30 of 32

• Impact of Control Parameters on Shearer-Generated Dust Levels
  1/1/2002 - Peer reviewed journal articles
  Full-scale laboratory tests provide information to longwall operators that would assist them in selecting control parameters to reduce dust levels for mine-specific conditions.
• Effects of Water Sprays Used With a Machine-Mounted Scrubber on Face Methane Concentrations
  2/1/2001 - Conference papers
  Past studies with blowing face ventilation systems have shown that using a machine-mounted scrubber and water sprays can reduced methane levels at the face.
• Comparison of Methane Concentrations at a Simulated Coal Mine Face During Bolting
  4/1/1999 - Peer reviewed journal articles
  An evaluation of strategies for monitoring methane levels during roof bolting in an extended cut entry.
• Technology News 465 - Method for Predicting Methane Emissions on Extended Longwall Faces
  11/1/1997 - Technology News
  A method is described for allowing operators to predict methane emissions from panels with increased face width.
• Impact of Unbalanced Intake and Scrubber Flows on Face Methane Concentrations
  2/1/1997 - Conference papers
  Research was conducted to investigate how ventilation of a mining face is affected when scrubber flow is greater or less than intake flow.
• Technology News 430 - Translucent Face Partition Reduces Longwall Worker's Dust Exposure
  3/1/1994 - Technology News
  The USBM's current approach to air splitting consists of using a polyester mesh partition to overcome the visibility problems of a solid barrier.
• Jet Fan Ventilation in Very Deep Cuts - A Preliminary Analysis
  1/1/1992 - Reports of Investigations
  This report investigates that application of jet fans to ventilate cuts that extend beyond 40 feet. The results of tests involving a jet fan in a 90 foot entry, its benefits and potential problems are discussed.
• Controlling a Thin-Seam Miner 500 Feet from the Face
  7/1/1986 - Conference papers
  This report summarizes work sponsored by the Bureau of Mines in the development of a remote operating system (ROS) for controlling a thin-seam continuous miner (TSCM) 500 feet or more distant from the extraction face.
• Simulation of Methane Flows in Noncoal Mines
  1/1/1984 - Reports of Investigations
  The Bureau of Mines has successfully tested a method to simulate methane (CH4) flows from face areas through the returns of noncoal mines. This technique involves releasing a small quantity of tracer gas at a working area and sampling for that gas downs...
• Face Ventilation Measurement with Sulfur Hexafluoride (SF6)
  1/1/1980 - Reports of Investigations
  The face ventilation measurement method developed by the Bureau of Mines involves releasing a small volume of tracer gas (SF6) on the off-curtain side of the working face at the start of the mining cycle.